From 49dbe25adac42d3e06f65d1420946bec65896222 Mon Sep 17 00:00:00 2001 From: Arseniy Krasnov Date: Tue, 10 Oct 2023 22:15:14 +0300 Subject: vsock: read from socket's error queue This adds handling of MSG_ERRQUEUE input flag in receive call. This flag is used to read socket's error queue instead of data queue. Possible scenario of error queue usage is receiving completions for transmission with MSG_ZEROCOPY flag. This patch also adds new defines: 'SOL_VSOCK' and 'VSOCK_RECVERR'. Signed-off-by: Arseniy Krasnov Reviewed-by: Stefano Garzarella Signed-off-by: David S. Miller --- include/uapi/linux/vm_sockets.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'include/uapi/linux/vm_sockets.h') diff --git a/include/uapi/linux/vm_sockets.h b/include/uapi/linux/vm_sockets.h index c60ca33eac59..ed07181d4eff 100644 --- a/include/uapi/linux/vm_sockets.h +++ b/include/uapi/linux/vm_sockets.h @@ -191,4 +191,21 @@ struct sockaddr_vm { #define IOCTL_VM_SOCKETS_GET_LOCAL_CID _IO(7, 0xb9) +/* MSG_ZEROCOPY notifications are encoded in the standard error format, + * sock_extended_err. See Documentation/networking/msg_zerocopy.rst in + * kernel source tree for more details. + */ + +/* 'cmsg_level' field value of 'struct cmsghdr' for notification parsing + * when MSG_ZEROCOPY flag is used on transmissions. + */ + +#define SOL_VSOCK 287 + +/* 'cmsg_type' field value of 'struct cmsghdr' for notification parsing + * when MSG_ZEROCOPY flag is used on transmissions. + */ + +#define VSOCK_RECVERR 1 + #endif /* _UAPI_VM_SOCKETS_H */ -- cgit v1.2.3